<template >
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <el-row :gutter='20'>
        <el-col :span='8'>
          <el-input placeholder="请输入内容" v-model='queryInfo.query' clearable
            @clear="getGoodsList">
            <el-button slot="append" icon='el-icon-search'
              @click="getGoodsList"></el-button>
          </el-input>
        </el-col>
        <el-col :span='4'>
          <el-button type='primary' @click="goAddPage">添加商品</el-button>
        </el-col>
      </el-row>
      <!-- 商品列表 -->
      <el-table :data='goodslist' border stripe>
        <el-table-column type='index'></el-table-column>
        <el-table-column label='商品名称' prop='goods_name'></el-table-column>
        <el-table-column label='商品价格(元)' prop='goods_price' width='95px'>
        </el-table-column>
        <el-table-column label='商品重量' prop='goods_weight' width='70px'>
        </el-table-column>
        <el-table-column label='创建时间' prop='add_time' width='180px'>
          <template slot-scope="scope">
            {{scope.row.add_time|dateFormat}}
          </template>
        </el-table-column>
        <el-table-column label='操作' width='130px'>
          <template slot-scope="scope">
            <el-button size='mini' type='primary' icon='el-icon-edit'
              @click="showBox(scope.row)">
            </el-button>
            <el-button size='mini' type='danger' icon='el-icon-delete'
              @click="removeById(scope.row.goods_id)">
            </el-button>
          </template>
        </el-table-column>
      </el-table>
      <!-- 分页 -->
      <el-pagination @size-change="handleSizeChange"
        @current-change="handleCurrentChange" :current-page="queryInfo.pagenum"
        :page-sizes="[10, 20, 30, 50]" :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper" :total="total"
        background>
      </el-pagination>
    </el-card>
    <!-- 编辑商品的对话框 -->
    <el-dialog title="编辑商品" :visible.sync="editDialogVisible" width="30%">
      <el-form :model='editGoodsForm' ref="editGoodsRef"
        :rules='editGoodsRules'>
        <el-form-item label='商品名称' prop='goods_name'>
          <el-input v-model="editGoodsForm.goods_name"></el-input>
        </el-form-item>
        <el-form-item label='商品价格' prop='goods_price'>
          <el-input v-model="editGoodsForm.goods_price"></el-input>
        </el-form-item>
        <el-form-item label='商品数量' prop='goods_number'>
          <el-input v-model="editGoodsForm.goods_number"></el-input>
        </el-form-item>
        <el-form-item label='商品重量' prop='goods_weight'>
          <el-input v-model="editGoodsForm.goods_weight"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editGoods">确 定
        </el-button>
      </span>
    </el-dialog>

  </div>
</template>
<script>
export default {
  data () {
    return {
      // 查询参数对象
      queryInfo: {
        query: '',
        pagenum: 1,
        pagesize: 10
      },
      // 商品列表
      goodslist: [],
      // 总数据条数
      total: 0,
      editDialogVisible: false,
      // 编辑商品的数据对象
      editGoodsForm: {
        goods_name: '',
        goods_price: '',
        goods_number: '',
        goods_weight: ''
      },
      // 即将被编辑的id
      goodsId: '',
      editGoodsRules: {
        goods_name: [
          {
            required: true, message: '请输入必填项'
          }
        ],
        goods_price: [
          {
            required: true, message: '请输入必填项'
          }
        ],
        goods_number: [
          {
            required: true, message: '请输入必填项'
          }
        ],
        goods_weight: [
          {
            required: true, message: '请输入必填项'
          }
        ]
      }

    }
  },
  created () {
    this.getGoodsList()
  },
  methods: {
    async getGoodsList () {
      const res = await this.$http.get('goods', { params: this.queryInfo })
      if (res.meta.status !== 200) return this.$message.error('获取商品列表失败')
      this.goodslist = res.data.goods
      this.total = res.data.total
    },
    // 分页的方法
    handleSizeChange (newSize) {
      this.queryInfo.pagesize = newSize
      this.getGoodsList()
    },
    handleCurrentChange (newPage) {
      this.queryInfo.pagenum = newPage
      this.getGoodsList()
    },
    // 删除商品
    async removeById (id) {
      const confirmResult = await this.$confirm('此操作将永久删除该参数, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.error('已经取消删除')
      }
      const res = await this.$http.delete('goods/' + id)
      if (res.meta.status !== 200) return this.$message.error('删除商品失败')
      this.$message.success('删除商品成功')
      this.getGoodsList()
    },
    // 跳转到添加商品页面
    goAddPage () {
      this.$router.push('/goods/add')
    },
    // 编辑商品列表 显示
    async showBox (row) {
      const res = await this.$http.get('goods/' + row.goods_id)
      if (res.meta.status !== 200) return this.$message.error('获取数据失败')
      this.editGoodsForm = res.data
      this.goodsId = row.goods_id
      this.editDialogVisible = true
    },
    // 编辑商品
    async editGoods () {
      const res = await this.$http.put('goods/' + this.goodsId, this.editGoodsForm)
      if (res.meta.status !== 200) return this.$message.error('更新数据失败')
      this.$message.success('更新数据成功')
      this.getGoodsList()
      this.editDialogVisible = false
    }

  }
}
</script>
<style lang="less" scoped>
.el-card {
  margin: 20px 0;
}
</style>
